I have a 3 bedroom house with a modern central heat/ac. The central heat is a new 3 burner/ton gas furnace by Lennox. I live in an area where daytimes are comfortable but evenings are cold and I have been using an electric space heater to keep the room I sleep in warm at night. I know there are many variables, but assuming everything is average (average size home, bed room, insulation, etc) would it be cheaper to heat only one room with the more expensive electricity or the entire house with the cheaper natural gas?
Heat the one room.
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